Aroma diffuser



FIG. 1 is a top, front and left side perspective view of our new design for an aroma diffuser;

FIG. 2 is a left side elevation view of the aroma diffuser shown in FIG. 1;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a front elevation view of the aroma diffuser shown in FIG. 1;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a top plan view of the aroma diffuser shown in FIG. 1; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for an aroma diffuser, substantially as shown and described. 